Why do the stems of plants grow around the rods?

Because the leaves of plants have a "phototropic movement".The tendrils and tangled stems of climbing plants, auxin on the side touching the support.

The content is small, and the growth is slow; On the other hand, there is a lot of auxin and they grow faster, so they spiral upwards.

1. The reason why the stem of the plant grows around the rod

The leaves of plants have a "phototropic movement", and the stems of plants always grow upwards with a "negative geotropic movement" in order to get sunlight and photosynthesize.

Roots always grow downwards and there is a "geotropic movement" of plants, such as phototropism, ground-tropism, and negative geotropism, which are collectively referred to as "tropic movements".

The reason why plants produce tropic movement is mainly the result of auxin, and the tendrils and winding stems of climbing plants have less auxin content and slower growth on the side that touches the support. The other side contains a lot of auxin and grows faster, so they are spiraled around the support.

2. Introduction to the winding stem plant

Morning glory. Although the stems of plants such as beans and wisteria do not have special appendages such as tendrils and suction cups, their stems have the ability to spiral along other objects, so they are called winding stems.

Interestingly, the stem rotation direction of different plants is also different, such as wisteria, bean and spinning flower stems rotate from left to right, called left-handed winding stem; And the law grass.

The five-leaf stem is wound from right to left, which is called right-handed winding stem; There are also those that can be rotated left and right, which are called left and right rotation winding stems.

3. What are the common plants with winding stems? How to maintain?

There are many plants that entangle the stems, such as honeysuckle, morning glory, and aristolochia.

Polygonum multiflori, kidney beans, wisteria, bowl flowers.

Grass, five-leaf leaves, lentils, spiral flowers, etc.

Maintenance is also relatively simple, as long as the environment is well lit and well ventilated, the rest is a watering problem. If the potting soil is selected properly, the surface of the potting soil is whitish, and it can be watered. As for fertilization, it should be done once every half a month, choose nitrogen, phosphorus and potassium compound fertilizer, you can choose sea meal fertile compound water-soluble fertilizer, the ratio is balanced, and the nitrogen fertilizer should not be too much, so as not to be too lush with stems and leaves.

The stem of the plant grows around the stem, which is mainly determined by the growth habit of the plant. The reason why plants produce tropic movement is mainly the result of auxin action.

The stems of general plants can be divided into erect stems, winding stems, climbing stems, stolons, and recumbent stems according to their growth habits.

The stem of the general plant, the stem that grows upwards with a support; Called the winding stem. This kind of stem is relatively soft in the young stage, can not stand upright, with the stem wrapped around the support to rise, so that the branches and leaves can grow well; If you leave the support, you will fall to the ground.

Plants that wrap their stems generally grow upwards in three ways: the direction of winding is left-handed (counterclockwise) such as morning glory, bowl flower, aristolochia, and bean; The direction of the winding is right-handed (clockwise), e.g. lentils, honeysuckle. The direction of winding can be left or right, called neutral winding stem, how to shou wu, etc.

The winding stem of a plant is the morphology of a spiral in three-dimensional space. The spiral is a fascinating mathematical curve that is incredibly connected to the natural world, and there are traces of the spiral everywhere from the double helix structure of the DNA molecule to the flower disc of the sunflower.

The direction of the twisting stem of the morning glory is the same as that of the right-hand spiral rule, and to satisfy the right-hand spiral rule, the four fingers are bent in the direction of its winding, and the pointing of the thumb is the direction of its growth.

The leaves of plants have phototropic movements, the stems of plants always grow upwards with "negative geotropic movements" in order to get sunlight and photosynthesis, and the roots always grow downwards with "geotropic movements" in order to get water and fertilizers, and this phototropic, geotropic and negative geotropic movements of plants are collectively referred to as "geotropic movements". The reason why plants produce tropic movement is mainly the result of auxin action. The tendrils and winding stems of climbing plants have less auxin content and slower growth on the side of contact with the support. The opposite side contains a lot of auxin and grows faster, so they are spiraled around the support.

Recent research by scientists has shown that the directional nature of the rotation and winding of plants is an instinct inherited from their respective ancestors. In order to get more sunlight and space for them to grow and develop better, the tips of their stems are tightly oriented towards the rising sun in the east and setting in the west. In this way, the stems of plants growing in the southern hemisphere rotate to the right, and the stems of plants growing in the northern hemisphere rotate to the left.

After a long process of adaptation and evolution, they gradually formed their own rotational and winding fixed directions. Later, although they were transplanted to different geographical locations, the characteristics of their rotation direction were inherited and fixed. With this rotational growth property, he will grow around the branches.